Very simply, no you can't "just call" code from another IDE.
You could export the Eclipse code to a JAR, import as a library into Android Studio, then try to work around that, but that sounds like a lot of work.
In regards to your previous questions, plus your comment.
it was working in eclipse, but when I literally copy and paste that exact same code into android studio, I am getting network issues when I run it.
Android has a UI Thread that does not like to handle Network requests like your bare single-threaded Eclipse project.
You need a separate thread. Without any libraries, there is AsyncTask, and the Android documentation covers this.
Though, you may find OkHttp to be better documented, useful, and less confusing than AsyncTasks. Volley is another, though works fine, is not very well documented.
See more discussion at Comparison of Android networking libraries: OkHTTP, Retrofit, and Volley